+280 The initial point of vector a is (−5,1), and its terminal point is (−1,−3).
What is the value of ||vector a||?
Enter your answer, as a simplified radical, in the box.
||vector a|| = ____
+37146 sqrt (( -5- -1)^2 + (1- - 3)^2 )
sqrt ( 16 + 16) = sqrt 32 = 4 sqrt2
